Motor treadmill apparatus.



w. Rosa'- MOTOR TREADMILL' APPARQTUS.

APPILICATION FILED FEE-23,191]

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Patented Feb. .18, 1919- 142 I 20 Eli ' i2 and 13 of MASSACHUSETTS.

MOTOR TREADMILL APPARATU S.

Applicationfiled February 28. 1917.

To all whom it may concern:

Be it known that I, Roismrr ll. ROSE, a

citizen of the United States, and resident of lllarblehead, in the county of Essex and State of lllassachuset'is. have invented an Improvement in Motor 'lreadnull Apparatus, of which the following description, in-

connection with the accompanying drawings, is a specification, like letters on the drawing representing like parts.

iy present invention is an apparatus adapted to take power from the rear wheels of an automobile and apply the same to a power transmission mechanism, by an extremely simple, efiicient and structure which simultaneously lifts the auto wheels from the ground and applies a. driving pressure between the wheels and the drive pulleys of the transmission ap mratus.

In prior devices of this kind ii: has been necessary to use jacks, levers, or the like, to raise the auto wheels and then either to use the weight of the rear wheels or employ separate devices to create the friction sullicient to drive the power transn'iission mechanism from the auto wheels. These prior devices were expensive, complex, and unsatisfactory, particularly in operation with a light weight automobile, since the weight of the rear wheels and power of a small car was insuilicient to give suitable driving friction.

My present apparatus obviates the dilhculties above noted, and enables a perfect fric tion contact drive to be secured between the rear wheels transn'nssion device, irrespective of the Weight of the car and all by a single movement.

preferred embodiment of the invention,

Figure 1 is a plan view of my apparatus showing the rear wheels of an auto, in frugmentary form, and in driving position;

Fig. 2 is a side view, eliminating the auto springs, running body, etc.

My apparatus comprises a frame consisting in the side supports 1 and 2, and crossbars 3 and 4-, giving a firm foundation, to which foundation blocks 5 and 6 are secured, having journal bearings Tand 8 for a shaft 9, to which are keyed pulleys 10 and 11 in spaced position to fit against the rear wheels an automobile. Keyed alsoon the shaft 9 is a. pulle 14, from which a belt leads to the particu er machine, such as buzz saw, hoisting drum, pump, [concrete Specification of Letters Patent.

economical and the pulleys-of the power latter carries a crank 33 and Referrmg to the drawings illustrating a Patented Feb. 15919., Serial No. 150,315).

mixer, power.

Pivotal plates to the frames 1 and 2 are provided at 15 and 16, to which are secured arms 17 and 18 by pins 19. Each arm 18, which is preferably made of bar iron or steel, has its upper portion hammered round into a rest 20 adapted to fit beneath the rear axle 21 of the automobile on which the wheels 12 and 13 are mounted. A leather pad may be fitted lo the portion :20 in each arm so as not to scar the finish on the automobile axle 21. The arms 18 are :ulapted to be tilted forwari'lly, as shown in dotted line position, Fig". 2. so as to be lowered sullicicntly for the aulomobilo axle 21 to be rolled thereover, with the wheel or tire port-ions resting on the ground. The arms 18 are then sinulltaneously-rocked on their pivots and engage, lift, and force the rear axle 21 toward the pulleys l0 and 11, simultaneously raising and moving the peripheral surfaces of the wheels 12 and 13 toward the pulleys 10 and 11, until a desired driving and non-slipping irietion' is secured. 'lio accomplish this result. Li provide a pair of iron straps 2-1- and 25, pivoting the same at 26, 26, to each arm 18, and leading said straps rearwardly to be joined at a point if to a block 28. The straps and block may be welded, riveted, or otherwise securedtogether, and the block 28 is threaded to receive a come spondingly threaded screw 30. This screw 30 leads through a brace crossbar a! bolted to the side supports T. and 2. @n the face of the brace-31 is a metal plate 32 threaded to receive the screw 30, which handle ill on its outermost end. ll/lanipulaliion oi the crank 33 moves the straps 2i: and toward and fromthe members 31, therebyroclring pivots 19 and simulthe arms 18 on their taneously liiling and forcing the wheels and 13 against the transmission pulleys l0 and 11. Rotation of the motor imparts rotary movement through the wheels 12 and 13, pulleys 10 and 11, and belt pulley ll to the desired machinery, as will be readily understood. The slight oscillation between the arms 24.- and 25 va-tirally during; the rocking of the arms 18, is easily taken up by the plate 32, suflicient play being found between the coarse threads of as heavy and powerful av screw. asthat used, as indicated at 30, for such limited play, as is necessary. The board recess through the brace 31 indi- 31 mounted on a .ldil

cated at 35 is of suiiiciently greater diameter than the screw 30 to readily permit of such oscillations directly from the plate 32.

My apparatus is extremely simple, light, strong and eiiicient and can be readily transported to any place, being in fact capable of being loaded on board an ordinary small antomobile, carried to a place of use, at once set up on the ground, and the automobile rolled over the catches 20 and instantly and simultaneously lifted and forced against the pulleys with a desired driving friction, irrespectii e of the weight of the rear wheels and the automobile, and the apparatus is ready for use. Should any slippage occur between the auto Wheels and the drive pulleys, a further tightening of the screw 30 corrects same.

My invention is further described in the form of a claim as follows:

Apparatus of the kind described, adapted to receive and transmit power from the rear Wheels of an automobile, comprising a memes frame, a pair of pulleys rotatably mounted on said frame, a pair of vertically extending pivoted arms, adapted to fit under the rear axle of an automobile While the driving wheels are resting on the ground, a pair of straps extending from each pivoted arm to a single screw bearing arranged centrally of the frame, and means to rotate said screw to move both said straps and rock each arm, simultaneously lifting the axle, freeing the wheels from the ground and forcing their )eripheries against the pulleys by the single rotative action of said cent 'al screw, automatically equalizing the driving friction between both Wheels and their respective pulleys.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

ROBERT WV. ROSE Witnesses HAROLD G. CLARK, Duncan L. MAOINTYRE. 

